![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
(1)完成
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b72fcdc709e77910cd36a26369648b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24c4bf61e073c899494b2fb3b767b108.png)
有兴趣 | 没兴趣 | 合计 | |
男 | 55 | ||
女 | |||
合计 |
附表:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5faae3568e6ebcf20e57d05f14b9e25d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04a09094d59ea7e891b2ed4604ee6ff3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2553c3cb1bda75f54adf38f2ae67fc35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a75a77575435aae6c9b27f62ff9ed6b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14b486df24e9330e5e22f9edf66e08d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8978b382812c50c429316472a72a24fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3bd726b51e583c03c0c9e314deda4b.png)
男生 | |||||
频数 | 2 | 14 | 22 | 7 | 5 |
女生 | |||||
频数 | 9 | 8 | 16 | 11 | 6 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2553c3cb1bda75f54adf38f2ae67fc35.png)
(2)根据数据统计表中的数据,该公司想研究
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2553c3cb1bda75f54adf38f2ae67fc35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95c487ba8259608d3cb24fb594ffbd7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2553c3cb1bda75f54adf38f2ae67fc35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14b486df24e9330e5e22f9edf66e08d9.png)
附:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b2f70b01e964f4084816bd12125b714.png)
0.050 | 0.010 | 0.001 | |
3.841 | 6.635 | 10.828 |
每穗颗粒数 | |||||
甲品种 | 20 | 30 | 20 | 20 | 10 |
乙品种 | 18 | 22 | 30 | 18 | 12 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b72fcdc709e77910cd36a26369648b3.png)
优等穗 | 劣等穗 | 合计 | |
甲品种玉米 | |||
乙品种玉米 | |||
合计 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e3821f70c08c5180e9b3086d3c9610f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356b05e46b10ee51c3e43546d73ec96c.png)
0.40 | 0.25 | 0.10 | 0.05 | 0.025 | 0.010 | 0.005 | 0.001 | |
0.708 | 1.323 | 2.706 | 3.841 | 5.024 | 6.635 | 7.879 | 10.828 |
赞成禁放 | 不赞成禁放 | 合计 | |
老年人 | 40 | 120 | 160 |
中青年人 | 60 | 100 | 160 |
合计 | 100 | 220 | 320 |
(2)从上述赞成禁放烟花爆竹的市民中按年龄结构分层抽样抽出5人,再从这5人中随机挑选出2人,求至少有1人是老年人的概率.
参考数据与公式:
![]() | 0.050 | 0.025 | 0.010 | 0.001 |
![]() | 3.841 | 5.024 | 6.635 | 10.828 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e3821f70c08c5180e9b3086d3c9610f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2824ba82c2227475c27a9fea5e30245a.png)
甲校:
分组 | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
频数 | 2 | 3 | 10 | 15 | 15 | ![]() | 3 | 1 |
分组 | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
频数 | 1 | 2 | 9 | 8 | 10 | 10 | ![]() | 3 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(2)由以上统计表填写下面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b72fcdc709e77910cd36a26369648b3.png)
甲校 | 乙校 | 总计 | |
优秀 | |||
不优秀 | |||
总计 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e3821f70c08c5180e9b3086d3c9610f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356b05e46b10ee51c3e43546d73ec96c.png)
参考数据:
![]() | 0.100 | 0.050 | 0.010 | 0.001 |
![]() | 2.706 | 3.841 | 6.635 | 10.828 |
每日阅读时间(单位:小时) | ||||
人数 | 15 | 30 | 40 | 15 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b72fcdc709e77910cd36a26369648b3.png)
父亲或母亲喜欢阅读 | 父母均不喜欢阅读 | 总计 | |
学生“特别喜欢”阅读 | 40 | ||
学生“非特别喜欢”阅读 | |||
总计 | 100 |
附:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/668a2ee7c45f4f8c85c6823ada024700.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356b05e46b10ee51c3e43546d73ec96c.png)
0.05 | 0.025 | 0.010 | 0.005 | 0.001 | |
3.841 | 5.024 | 6.635 | 7.879 | 10.828 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b72fcdc709e77910cd36a26369648b3.png)
喜欢汉服 | 不喜欢汉服 | 合计 | |
男生 | 50 | ||
女生 | 70 | 120 | |
合计 | 200 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b72fcdc709e77910cd36a26369648b3.png)
附:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/553138f7658eae6a094655cc1eba3bf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356b05e46b10ee51c3e43546d73ec96c.png)
0.1 | 0.05 | 0.01 | 0.005 | 0.001 | |
2.706 | 3.841 | 6.635 | 7.879 | 10.828 |
月份 | 1 | 2 | 3 | 4 | 5 |
违章驾驶员人数 | 120 | 105 | 100 | 95 | 80 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929ef3bed0a4bdd22f39e036506dc481.png)
(2)交警从这5个月内通过该路口的驾驶员中随机抽查70人,调查驾驶员不“礼让行人”行为与驾龄的关系,得到下表:
不礼让行人 | 礼让行人 | |
驾龄不超过1年 | 24 | 16 |
驾龄1年以上 | 16 | 14 |
附:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bc485c58dbd6e50bfb352030f4a1c42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356b05e46b10ee51c3e43546d73ec96c.png)
![]() | 0.15 | 0.10 | 0.05 | 0.025 | 0.010 |
![]() | 2.072 | 2.706 | 3.841 | 5.024 | 6.635 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f0fe5a44e2bfcb7e4c347e8970e9e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a58291bd91befe1061530246da983727.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)某销售网点为调查该款盲盒的受欢迎程度,随机发放了200份问卷,并全部收回.经统计,有30%的人购买了该款盲盒,在这些购买者当中,女生占
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
女生 | 男生 | 总计 | |
购买 | |||
未购买 | |||
总计 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bc485c58dbd6e50bfb352030f4a1c42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356b05e46b10ee51c3e43546d73ec96c.png)
参考数据:
![]() | 0.10 | 0.05 | 0.025 | 0.010 | 0.005 | 0.001 |
![]() | 2.706 | 3.841 | 5.024 | 6.635 | 7.879 | 10.828 |
周数![]() | 1 | 2 | 3 | 4 | 5 | 6 |
盒数![]() | 16 | ______ | 23 | 25 | 26 | 30 |
①请用4,5,6周的数据求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929ef3bed0a4bdd22f39e036506dc481.png)
(注:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dda5e0b7c97f509033b5910bf2ebe11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a58291bd91befe1061530246da983727.png)
②若由线性回归方程得到的估计数据与所选出的检验数据的误差均不超过2盒,则认为得到的线性回归方程是可靠的,试问①中所得的线性回归方程是否可靠?
不近视 | 近视 | |
男生 | 25 | 25 |
女生 | 20 | 30 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28b4b06478c218a0e3421f8c52427c8b.png)
附:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2187714e660234f0b72f2b47d3ea685a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356b05e46b10ee51c3e43546d73ec96c.png)
2.072 | 2.706 | 3.841 | 5.024 | 6.635 | 7.879 | 10.828 | |
0.15 | 0.10 | 0.05 | 0.025 | 0.010 | 0.005 | 0.001 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bf3baba074e8aeb6f3ea117865bbd1b.png)